Standalone Window Size Not Displaying In Fullscreen

Setting the standalone window size does not seem to have any effect, and using the -fullscreen parameter does not display the window in fullscreen.

Setting the Standalone Window Size to 1920x1080 and adding the -fullscreen command opened up a fullscreen window as expected in 4.11.2 binary. As a result, this is a regression.

Found in 4.12.2 binary. Reproduced in Main CL 3014400

1. Open the editor
2. Go to Edit->Editor Preferences->Play
3. Set the Standalone Window Size to 1920x1080
4. Click the dropdown arrow under the Play in Standalone Game category
5. In the Additional Launch Parameters section, use the -fullscreen command
6. Play in Standalone

Result: Standalone window displays at original size

Expected: Window would open in 1920x1080 fullscreen.

How does TextureRenderTarget2D get TArray<uint8> type data?

Why does the REMOVE method of map container remove elements have memory leaks?

UMG RichText not appear image when packaged

How do I set a material as a post-processing material?

Where can I download the source address of the deployment cotum service associated with the PixelStream plugin?

Do I need to call Destory method to remove components from Actor when Destory method to remove Actor?

How to delete some elements correctly when deleting an array loop?

What is the difference between Camera and CineCamera?

How to implement springarm components to scale according to mouse position in spawn?

为什么我的电脑无法安装ue，错误代码一直是IS-IN-BV05,该如何解决